Zamioculcas plant named ‘DUYZAM1801’

ABSTRACT

‘DUYZAM1801’ is a new and distinctive Zamioculcas plant which is characterized by a relatively tall plant height, large leaves arising directly from tubers, and leaves comprised of dark green leaflets born on long light brown petioles and an abundance of dark green foliage. The new plant propagates successfully by leaf cuttings and has shown to be uniform and stable in the resulting generations from asexual propagation.

Latin name of the genus and species: The Latin name of the genus andspecies of the novel variety disclosed herein is Zamioculcas zamiifolia(hort. Lodd.) Engl.

Variety denomination: The inventive variety of Zamioculcas disclosedherein has been given the variety denomination ‘DUYZAM1801’.

BACKGROUND OF THE INVENTION

Parentage: ‘DUYZAM1801’ is a naturally occurring whole-plant mutation ofan unnamed Zamioculcas zamiifolia plant (not patented) which wasdiscovered by the inventor in May of 2016 at a commercial greenhouse inDe Lier, The Netherlands. The mutation was noted for its tall plantheight with large dark green leaflets borne on a light brown petiole.

Asexual Reproduction: Asexual reproduction of ‘DUYZAM1801’ was firstaccomplished in May of 2016 by way of stem cuttings at a commercialgreenhouse in De Lier, The Netherlands. Six successive generationsproduced from stem cuttings have shown that the unique features of theinstant cultivar are stable and reproduce true to type.

SUMMARY OF THE INVENTION

The cultivar ‘DUYZAM1801’ has not been observed under all possibleenvironmental conditions and the phenotype may vary somewhat withvariations in the instant environment such as temperature, day length,and light intensity, without, however, any variance in genotype. Thefollowing characteristics have been repeatedly observed and representthe distinguishing characteristics of the new Zamioculcas plant,‘DUYZAM1801’. These traits, in combination, distinguish ‘DUYZAM1801’ asa new and distinct cultivar.

-   -   1. Zamioculcas ‘DUYZAM1801’ exhibits a tall plant height; and    -   2. Zamioculcas ‘DUYZAM1801’ exhibits large, pinnately compound        foliage, which arises directly from tuberous rhizomes; and    -   3. Zamioculcas ‘DUYZAM1801’ exhibits dark green, glossy obovate        to elliptic leaflets borne on long light brown petioles.    -   4. Zamioculcas ‘DUYZAM1801’ exhibits leaflets that are slightly        carinate, revolute, and longitudinally curled downward at and        towards the apex.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 shows, as nearly true as it is reasonably possible to make thesame in color illustrations of this type, the typical foliage and growthcharacteristics of the new cultivar, ‘DUYZAM1801’. The plant shown isapproximately 18 months old, potted into a 14 cm nursery pot, grown at acommercial greenhouse in De Lier, The Netherlands.

FIG. 2 shows, as nearly true as it is reasonably possible to make thesame in color illustrations of this type, the typical foliage of theplant in FIG. 1.

BOTANICAL DESCRIPTION OF THE PLANT

The following is a detailed botanical description of a new and distinctvariety of Zamioculcas hybrid known as ‘DUYZAM1801’, based uponobservations of 18 month old plants, potted into 14 cm nursery pots andgrown indoors at a commercial nursery in De Lier, The Netherlands.Plants were grown in partial shade using accepted fertility andirrigation practices for Zamioculcas plants. With the exception ofpreventative fungicides, no chemical pest control measures wereemployed. Furthermore, no artificial light or photoperiodic treatmentswere given to the plants. Observation data was recorded in October of2019.

Those skilled in the art will appreciate that certain characteristicswill vary with older or, conversely, with younger plants. ‘DUYZAM1801’has not been observed under all possible environmental conditions. Wheredimensions, sizes, colors and other characteristics are given, it is tobe understood that such measurements are approximations or averages setforth as accurately as practicable. The phenotype of the variety maydiffer from the descriptions set forth herein with variations inenvironmental, climactic and cultural conditions. Color notations arebased on The Royal Horticultural Society Colour Chart, The RoyalHorticultural Society, London, sixth edition, 2015.

A botanical description of ‘DUYZAM1801’ and comparisons with the parentplant and the most similar variety of common knowledge are providedbelow.

-   General plant description:    -   -   Growth habit.—Tropical evergreen perennial.        -   Plant profile shape.—Narrow inverted triangular to broad            oblong.        -   Growth rate.—Moderately fast growing.        -   Plant vigor.—Moderately vigorous to highly vigorous.        -   Height.—42.2 cm to the top of the foliar plane.        -   Width.—25.5 cm.        -   Propagation.—Type — Leaf cuttings. Time to initiate rooting            — Approximately 30 days at an approximate temperature of 25            degrees Celsius. Crop time — Approximately 1 year to produce            a marketable plant in a 14 cm.        -   Pathogen and pest resistance and susceptibility.—Plants have            not been observed to be susceptible or resistant to            pathogens and pests common to Zamioculcas sp.        -   Environmental tolerances.—Adapt to, at least, USDA Zones 10            to 12 and temperatures ranging from 5 to 40 degrees Celsius;            moderate tolerance to rain; low tolerance to wind.-   Stem:    -   -   Branching habit.—No stems or branches; compound leaves in            small clumps, arising directly from tuberous rhizomes.        -   Number of clumps per plant.—Four, on average.        -   Number of additional clumps formed each year.—Eight, on            average.-   Root system:    -   -   Type.—Tuberous rhizomes bearing thick fleshy roots.        -   Shape of rhizomes.—Irregular oblong to ovoid.        -   Dimensions of rhizomes.—6.2 cm long and 4.1 cm in diameter.        -   Density of rhizomes and roots.—Moderately dense.        -   Distribution of rhizomes and roots.—Rhizomes shallow; roots            distributed evenly throughout the soil profile, from shallow            to deep.        -   Texture of rhizomes and roots.—Glabrous and very fleshy.        -   Color of rhizomes and roots.—Greyed-green, nearest to a            mixture of RHS 195A and 195C.-   Foliage:    -   -   Arrangement.—Compound leaves in small clumps, arising            directly from tuberous rhizomes.        -   Attachment.—Petiolate.        -   Division.—Pinnately compound.        -   Leaf profile shape.—Narrow oblong.        -   Dimensions.—31.8 cm long and 7.4 cm wide.        -   Attitude.—Upright; approximately 10 degrees from vertical.        -   Quantity.—Approximately 12 leaves per clump.        -   Stipules.—General — A leafy stipule is present at the base            of each pinnately compound leaf. Shape — Ovate. Length —            9.4 cm. Width — 3.3 cm. Apex — Acute. Base — Broad cuneate.            Margin — Entire, moderately undulated. Texture — Papery.            Color, adaxial and abaxial surfaces — Greyed-orange, nearest            to in between RHS 164A and 164B.        -   Petiole.—Aspect — Rounded. Length — 27.9 cm. Diameter — 2.0            cm at the base and 0.6 cm on average. Attitude —            Approximately 5 degrees from vertical. Strength — Strong.            Texture — Smooth and glabrous. Luster — Matte. Color,            adaxial surface — Nearest to in between yellow-green and            greyed-green, RHS 148A and 195A, and closest to 195A;            irregularly blotched in between yellow-green and            greyed-green, RHS 147A and N189A, and closest to RHS 147A.            Color, abaxial surface — Nearest to in between yellow-green            and greyed-green, RHS 148A and 195A, and closest to 195A;            irregularly blotched in between yellow-green and            greyed-green, RHS 147A and N189A, and closest to RHS 147A.        -   Leaflets.—Quantity — Typically 16 leaflets. Attitude —            Upright. Dimensions — 6.2 cm long and 3.3 cm wide. Shape —            Obovate to elliptic. Aspect — Slightly carinate, revolute;            longitudinally curled downward, distally. Apex — Abruptly            acute. Base — Short attenuate to obtuse. Margin — Entire;            not undulated. Texture, adaxial surface — Glabrous and            moderately coriaceous. Texture, abaxial surface — Glabrous            and moderately coriaceous. Luster, adaxial surface — Very            glossy. Luster, abaxial surface — Glossy. Color — Juvenile            foliage color, adaxial surface — Nearest to in between green            and yellow-green, RHS 139A and 147A. Juvenile foliage color,            abaxial surface — Green, nearest to in between RHS NN137B            and 143A and closest to NN137B. Mature leaf color, adaxial            surface — Nearest to in between green and yellow-green, RHS            139A and 147A, but considerably darker. Mature leaf color,            abaxial surface — Green, nearest to in between RHS NN137B            and 143A and closest to NN137B. Venation — Pattern —            Pinnate. Vein color, adaxial surface — Green, nearest to RHS            137C. Vein color, abaxial surface — Green, nearest to RHS            143C. Petiolule — Length — 0.55 cm. Diameter — Petioles            flattened; average width is 0.3 cm and the average height is            0.2 cm. Strength — Strong. Color, adaxial surface —            Yellow-green, nearest to RHS 148A. Color, abaxial surface —            Darker yellow-green to greyed-green, nearest to RHS 148A and            197A. Texture, adaxial and abaxial surfaces — Glabrous.            Luster, adaxial and abaxial surfaces — Slightly glossy.-   Inflorescence: No flowering has been observed to date.

COMPARISON WITH THE PARENT PLANT

Plants of the new cultivar ‘DUYZAM1801’ may be distinguished from itsparent, an unnamed Zamioculcas zamiifolia plant, by the characteristicsdescribed in Table 1.

TABLE 1 Comparison Between ‘DUYZAM1801’ and The Parent Characteristic‘DUYZAM1801’ The parent Plant height. Shorter than the parent. Tallerthan ‘DUYZAM1801’. Leaflet aspect. Slightly carinate, Flatter thanrevolute, and ‘DUYZAM1801’. longitudinally curled downward towards theapex. Leaflet size. Smaller than the parent. Larger than ‘DUYZAM1801’.General coloration Darker shade of green Lighter shade of green of thefoliage. compared to the parent. compared ‘DUYZAM1801’.

COMPARISONS WITH THE MOST SIMILAR VARIETY OF COMMON KNOWLEDGE

Plants of the new cultivar ‘DUYZAM1801’ are most similar to thecommercial variety, Zamioculcas ‘EDZAMDARK1’ (U.S. Plant Pat. No.30,529). A comparison of ‘DUYZAM1801’ with ‘EDZAMDARK1’ is described inTable 2.

TABLE 2 Comparison Between ‘DUYZAM1801’ and ‘EDZAMDARK1’ Characteristic‘DUYZAM1801’ ‘EDZAMDARK1’ Plant height. Taller than Shorter than‘EDZAMDARK1’. ‘DUYZAM1801’. Leaflet shape. Obovate to elliptic.Elliptic. Leaflet aspect. Slightly carinate, revolute, Slightlycarinate, infolded, and longitudinally curled and longitudinally curleddownward towards the downward towards the apex. apex. General color- Inbetween green and Green. ation of the yellow green. foliage.

That which is claimed is:
 1. A new and distinct variety of Zamioculcas plant named ‘DUYZAM1801’, substantially as described and illustrated herein. 